December weather forecast
Brussels, Belgium

December sees Brussels, Belgium embrace winter fully, with the lowest average high temperature of the year at 6.1°C (43°F). Cold evenings, fewer daylight hours, and only about 1.5 sunshine hours per day set the scene for a classic European winter. Snowfall returns after its absence since early spring, peppering the cityscape with white caps and creating an enchantingly festive atmosphere. The holiday cheer coupled with the cold weather calls for layers of warm clothing, perhaps by a fireplace, completing the quintessential winter image.

Temperature

With the onset of December, the average high-temperature subtly recedes from November's chilly 9.5°C (49.1°F) to a still frosty 6.1°C (43°F). With a barely noticeable fluctuation in temperature, Brussels reaches an average low of 1.6°C (34.9°F) during the December nights.

Humidity

The most humid month is December, with an average relative humidity of 88.8%.

Rainfall

December is the month with the most rainfall. Rain falls for 19.3 days and accumulates 81mm (3.19") of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, in Brussels, snow falls for 4.6 days. In Brussels, during the entire year, snow falls for 23.7 days.

Daylight

With an average of 8h and 0min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 08:23 and sunset at 16:39. On the last day of December, sunrise is at 08:44 and sunset at 16:46 CET.

Sunshine

With an average of 1.5h of sunshine, December has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 1 in December leads to these guidelines:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.